Influence of pH of solution on phase composition of samarium-strontium cobaltite powders synthesized by wet chemical technique |
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| Authors: | Alina Ponomareva Valeri Babushok Elizaveta Simonenko Nikolai Simonenko Vladimir Sevast’janov Olga Shilova Irina Kruchinina |
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| Institution: | 1.Engineering School,Far Eastern Federal University,Vladivostok,Russia;2.KTC Consulting,Gaithersburg,USA;3.Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Science,Moscow,Russia;4.I.V. Grebenshchikov Institute of Silicate Chemistry of the Russian Academy of Sciences,Saint Petersburg,Russia;5.Saint-Petersburg State Electrotechnical University “LETI”,Saint-Petersburg,Russia |
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| Abstract: | Powders of Sm0.6Sr0.4CoO3-δ and La0.6Sr0.4CoO3-δ were synthesized using wet chemical technique. Structural and surface properties of synthesized materials were studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), IR spectroscopy, and scanning electron microscopy (SEM). The influence of pH on the phase state, chemical composition, morphology, and fractal dimension of the synthesized powders were investigated. It was found that the change of pH has the influence on phase composition of synthesized powders. The increase of solution pH allows one to obtain homogeneous samples at lower temperatures down to 900–950?°C. | |
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